Impact origin for the Hummeln structure (Sweden) and its link to the Ordovician disruption of the L chondrite parent body

@article{Alwmark2015ImpactOF,
  title={Impact origin for the Hummeln structure (Sweden) and its link to the Ordovician disruption of the L chondrite parent body},
  author={C. Alwmark and L. Ferri{\`e}re and S. Holm-Alwmark and J. Orm{\"o} and H. Leroux and E. Sturkell},
  journal={Geology},
  year={2015},
  volume={43},
  pages={279-282}
}
Several studies of meteorites show that a large disruption of an asteroid occurred ca. 470 Ma in our solar system's asteroid belt. As a consequence, a large number of meteorite impacts occurred on Earth during the following few million years. The finding and characterization, for the first time, of planar deformation features in quartz grains from rocks collected at the Middle Ordovician Hummeln structure (Sweden) prove the hypervelocity impact origin of the structure. The unambiguous shock… Expand
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